Sensor Replacement Procedures - Lycoming TEO-540-C1A Maintenance Manual

10. Sensor Replacement Procedures

A. Name, abbreviation, identification (ID) number and replacement procedures for each of the
sensors are identified in Table 3. The referenced figures show sensor locations.
CAUTION
NOTICE: Some of the sensor replacement instructions in Table 3 identify specific torque values
for sensors that have fastening hardware to attach the sensor to the wiring harness. For
other sensors that have fastening hardware refer to Table II section "Pipe Plugs" Part 1
for the given size of the hardware in the Standard Torque Tables in the latest revision of
the Service Table of Limits - SSP-1776 for applicable torque values. All other sensors
are either a band clamp type or bayonet type, which are installed with a quarter turn
rotation lock. Make sure the correct wiring harness connector is reconnected to the
sensor any time the wiring harness has been disconnected.
Sensor Name Abbr.
Crankshaft CRANK
Speed Sensor
72-70
Page 282
USE CAUTION AROUND THE WIRING HARNESS, SENSORS AND
ACTUATORS. THEY CAN BE EASILY DAMAGED AND CANNOT BE
REPAIRED. IF ANY OF THESE ITEMS ARE DAMAGED, THEY MUST
BE REPLACED. IF ONE WIRE BREAKS ON THE WIRING HARNESS,
THE COMPLETE HARNESS WILL NEED TO BE REPLACED.
Sensor Replacement Procedures
ID Qty. Location
A003 1 Mounted on
the accessory
housing
(Figure 35)
TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual
Table 3
Replacement Instructions
1. Disconnect the harness connector from the
sensor per instruction in the "Wiring
Harness Connectors" section in this
chapter.
2. Remove cable ties and clamps from the
sensor lead.
3. Remove and discard the safety wire/cable
from the cap screw.
4. Remove the cap screw and washer.
5. Remove the sensor and O-ring from the
accessory housing. Disassemble the O-ring.
6. Apply engine oil mixture to the O-ring on
the new sensor.
7. Install the new sensor with the O-ring in
the accessory housing with the cap screw
and washer. Torque the cap screw per the
Standard Torque Tables in the latest
revision of the Service Table of Limits -
SSP-1776.
8. Install new safety wire/cable on the cap
screw.
9. Connect the harness connector to the
sensor lead per instruction in the "Wiring
Harness Connectors" section in this chapter
and install cable ties and clamps.
10. Complete an operational ground check.*
© 2018 Avco Corporation. All Rights Reserved
November 2018